Trump is a 'divider,' says Robert Gates, former CIA director and defense secretary

The U.S. is facing multiple competing and simultaneous challenges at home and abroad. How has the country dealt with similar periods in the past? Former defense secretary and CIA director Robert Gates has a deep familiarity with the topic. He joins Judy Woodruff to discuss that and his new book, “Exercise of Power: American Failures, Successes, and a new Path Forward in the Post-Cold War World.”

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